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3 years ago

what us the velocity in meters per second of a runner who runs exactly 110 m toward the beach in 72 secs

Physics

1 answer:

finlep [7]3 years ago

4 0

Velocity = Distance / time taken

= 110 m /72s

1.52 ms⁻¹

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2 years ago

In the drawing, water flows from a wide section of a pipe to a narrow section. In which part of the pipe is the volume flow rate

guapka [62]

Answer:

Volume flow rate is the same in both sections of the pipe

Explanation:

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2 years ago

Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is normally distributed, with a mean

Reptile [31]

Answer: 56994 miles

Explanation:

Given : Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is normally distributed with

$\mu=50,000\text{ miles}$

Standard deviation : $\sigma=12,000\text{ miles}$

Let a be the distance traveled by at least 72% of the trucks.

Let X be the random variable that represents the distance traveled by a truck

Then $P(x\geq a)=0.72$

The critical value corresponds to p-value 0.72 : $z=0.5828415$

Also, $z=\dfrac{x-\mu}{\sigma}$

$\Rightarrow\ 0.5828415=\dfrac{a-50000}{12000}\\\\\Rightarrow\ a=12000(0.5828415)+50000=56994.098\approx56994$

Hence, 56994 miles will be traveled by at least (equal to and more than) 72% of the trucks .

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2 years ago

A tightly wound toroid of inner radius 1.2 cm and outer radius 2.4 cm has 960 turns of wire and carries a current of 2.5 A.

OLEGan [10]

Answer:

$B = 0.0533 \ T$

$B = 0.04 \ T$

Explanation:

From the question we are told that

The inner radius is $r = 1.2 \ cm = 0.012 \ m$

The outer radius is $r_o = 2.4 \ cm = \frac{2.4}{100} = 0.024 \ m$

The nu umber of turns is $N = 960$

The current it is carrying is $I = 2. 5 A$

Generally the magnetic field is mathematically represented as

$B = \frac{\mu_o * N* I }{2 * \pi * r }$

Where $\mu_o$ is the permeability of free space with a constant value

$\mu = 4\pi * 10^{-7} N/A^2$

And the given distance where the magnetic field is felt is r = 0.9 cm = 0.009 m

Now substituting values

$B = \frac{ 4\pi * 10^{-7} * 960* 2.5 }{2 * 3.142 * 0.009 }$

$B = 0.0533 \ T$

Fro the second question the distance of the position considered from the center is r = 1.2 cm = 0.012 m

So the magnetic field is

$B = \frac{ 4\pi * 10^{-7} * 960* 2.5 }{2 * 3.142 * 0.012 }$

$B = 0.04 \ T$

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2 years ago

Inertia keeps your vehicle moving until a force slows it down, like __________.

GrogVix [38]

Technically all 3 of those would be correct answers. But applying the brakes would probably be the correct answer if all of the above isn't a answer.

5 0

2 years ago

Read 2 more answers